Prank w



F. W. MIX.

(No Model.)

LOCK.

No. 524,643. Patented Aug. 14, 1894.

FEB.

FIG. 7.

UNITED STATES PATENT OFFICE.

FRANK W. MIX, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE &; TOWN E MANUFACTURING COMPANY, OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters Patent No. 524,643, dated August 14, 1894.

Applica i n fil January 3, 1894. Serial No. 495,543. (N 0 model.

To all whom it may concern.-

Be it known that I, FRANK W. MIX, acitizen of the United States, residing at Stamford, county of'Fairfield, State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a specification.

My invention relates to cabinet locks, and particularly to using in connection with said locks an independent tumbler case, with which I combine certain other new and useful features.

I have in an application filed simultaneously herewith, shown an independent tumbler case in combination with a self-locking cabinet lock, and have in that application claimed such combination, but in this application I show a different combination of parts, which possesses certain advantages in security and method of operation.

The construction and operation of my improved lock will be readily understood by reference to the accompanying drawings, in Which-- Figure 1 is a front elevation of the lock with the tumbler casein place. Fig. 2 is a side view, partly in section, showing the method of attaching the tumbler case to the lock case. Fig. 3 is a rear view, with the lock case cut away and showing the hook actuating slide and guard in the retracted position. Fig. 4. is a detached view showing the hook actuating slide and guard, with one hook only in the locked position, and showing also the tumbler which holds said slide in the locked position. Fig. 5 is a side view of the slide and hook, and of the tumbler, partly in section, showing the stump. Fig. 6 is a .front view with the stationary guard re moved. Fig. 7 is the same with the stationary guard in place. Fig. 8 shows the reverse or rear of stationary guard.

1 is the cap of the lock case; 2 the tumbler case; 3 the groove which hooks into the cap of the lock case; 4the setscrew which engages with the tumbler case and holds it in place; 5 the stationary guard and guide for the spring books or bolts 6, 6; 7 the combined bolt actuating slide and guard; 8 the cam on the rear of key plug; 9 the tumbler or tumblers which hold the bolt slide in the locked or unlocked position; 10 the stump or dog against which said tumbler or tumblers rest; 11 that part of the bolt slide which prevents access to the edges of the hooks or bolts.

The tumbler mechanism shown is the wellknown Yale mechanism, but the form of mechanism is quite immaterial, as any preferred form may be used, and any style of tumbler case, or any desired mode of attaching it to the lock case. When the properkey is inserted, and the key plug revolved, the cam at the rear of the plug engages with the tumbler attached to the bolt slide, sets that tumbler, and the continued movementof the bolt slide, by means of the projection 11, above referred to, retracts the hooks when the lock is being unlocked, and permits them to move forward for locking when the ke'yis turned in the proper direction.

It is evident that when the lock is locked the bolt actuating slide is deadlocked so that it cannot be pushed back by any instrument inserted between the lid and. table of the desk, nor can access be had to the tumbler which so deadlocks it, except through the locking mechanism contained in the tumbler case; and further, by the construction of said slide the hook actuating piece 11 becomes also a guard for the edges of said locking hooks or bolts so that access to them for the purpose of pressing themback and unlocking them is prevented.

While I have shown atumbler dogging the slide it is not "an essential feature, because the cam on the end of the plug could be used for dogging said slide as has been commonly done in many well known forms of Yale locks and other well known locks. The only advantage of the tumbler is that it gives what is known as a livelier feeling to the lock when being operated.

Having thus described my invention. the following is what I claim as new therein and desire to secure by Letters Patent:

1. In a cabinet lock, the combination of the lock case, an independent tumbler case, a key plug carried by the tumbler case, abolt-actuating slide, a tumbler or tumblers for dogging said slide, and means connected with the key pendent tumbler case, spring .pressed hooks W or 'bolts,'a hook actuating slide operatively connected with said tumbler case, and which .actuat'es the hooks for-unlocking, and guards their edges when locked, substantially as described.

4. In combination with a lock, a bolt'actuating slide, adapted to be connected with and 'operatedby an independent key and tumbler 1nechanism,'andin turn toactuate the hooks or dogs of the lock, substantially as described.

FRANK -W. MIX.

Witnesses SOHUYLER MERRITT, GEO. E. WHITE. 

